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/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly
*/
// ScrollDemo2.java
//Another JScrollPane demonstration. This version activates some of the
//features of JScrollPane such as row and column headers.
//
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
import javax.swing.ScrollPaneConstants;
public class ScrollDemo2 extends JFrame {
JScrollPane scrollpane;
public ScrollDemo2() {
super("JScrollPane Demonstration");
setSize(300, 200);
setDefaultCloseOperation(EXIT_ON_CLOSE);
init();
setVisible(true);
}
public void init() {
JRadioButton form[][] = new JRadioButton[12][5];
String counts[] = { "", "0-1", "2-5", "6-10", "11-100", "101+" };
String categories[] = { "Household", "Office", "Extended Family",
"Company (US)", "Company (World)", "Team", "Will",
"Birthday Card List", "High School", "Country", "Continent",
"Planet" };
JPanel p = new JPanel();
p.setSize(600, 400);
p.setLayout(new GridLayout(13, 6, 10, 0));
for (int row = 0; row < 13; row++) {
ButtonGroup bg = new ButtonGroup();
for (int col = 0; col < 6; col++) {
if (row == 0) {
p.add(new JLabel(counts[col]));
} else {
if (col == 0) {
p.add(new JLabel(categories[row - 1]));
} else {
form[row - 1][col - 1] = new JRadioButton();
bg.add(form[row - 1][col - 1]);
p.add(form[row - 1][col - 1]);
}
}
}
}
scrollpane = new JScrollPane(p);
// Add in some JViewports for the column and row headers
JViewport jv1 = new JViewport();
jv1.setView(new JLabel(new ImageIcon("columnlabel.gif")));
scrollpane.setColumnHeader(jv1);
JViewport jv2 = new JViewport();
jv2.setView(new JLabel(new ImageIcon("rowlabel.gif")));
scrollpane.setRowHeader(jv2);
// And throw in an information button
JButton jb1 = new JButton(new ImageIcon("question.gif"));
jb1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
JOptionPane.showMessageDialog(null,
"This is an Active Corner!", "Information",
JOptionPane.INFORMATION_MESSAGE);
}
});
scrollpane.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER, jb1);
getContentPane().add(scrollpane, BorderLayout.CENTER);
}
public static void main(String args[]) {
new ScrollDemo2();
}
}
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